this is off the original blackwidow
9636 pro scsi install disk so you should find that it works ok.
It worked for me so I hope this solves your problem
The following files are found inside the driver download file.
|USBDRV98/GENEUSB.SYS||9.0 KB||22 Jan 1999|
|USBDRV98/GENEDEV.INF||770 bytes||12 May 1999|